Chair frame



FIG. 1 is a front perspective view showing the chair frame;

FIG. 2 is a front elevational view showing the chair frame; and,

FIG. 3 is a side elevational view showing the chair frame.

The features shown in discontinuous or broken lines are for illustrativepurposes only and form no part of the claimed design.

CLAIM I claim the ornamental design for a chair frame, as shown anddescribed.